Check the listing for details. CDHPOWER 2 inch Cup Bottom Bracket Conversion Kit Bearings Bike Crank Set-128mm. Color: Silver, Condition: New. Listed at 22.99 USD. Package including: 1 set BB Bottom Bracket Kit (BB cups and axle) 1. 2" Cup Bottom Bracket Set, Bottom Bracket Cup Set Bearings Included,2. Fits on most bikes such as beach cruiser, lowrider, chopper bike frames3. Compatible with normal bikes, not for motorized bicycles4. DIY 2 inch BB cup set;4. Material: steel;5. Length of axle is 128mm, Cup size: 51.1mm, Ball Retainer: 5/16 x 9, 68mm, 24 tpi, width of center axle is 19mm6. The bottom bracket is made of metal, high strength and long-lasting, solid and durable for you to use.Measure the diameter of bottom bracket shell before shopping, if it is exactly 2", then bottom bracket bearings set should fit. Width of center axle is 19mmPlease check picture before buying.Axle Length: 128mm, Cup Size: 51.1mm, Ball Retainer: 5/16 x 9, 68mm, 24 tpi.